Depending on the processed material from each drill must be properly sharpened. To verify the correct angle will help a specially prepared square plate of copper or aluminium with a thickness of 1 mm.
To become operational protractor enough to cut it cut, as shown in the picture: a large cutout at an angle of 120 degrees, the other half is 60 degrees and the surviving corner of a square is 90.
Recommend to read
ASYMMETRICAL TRAILER
The owners of a motorcycle with a sidecar often wonder about how to increase its capacity? The original solution to this question offered a reader of our magazine A. Tatarnikov in his...
HUMAN-TORPEDOES
A large part of the surface of the Earth is covered with water. Since ancient times people preferred to live near rivers, lakes, seas and oceans, learning the techniques of crossing...
